Browser SDKs

The following items apply only to the following SDKs:

• Javascript Client SDK
• React SDK
• Vue SDK

Send events only for variation

Avoid sending spurious events when allFlags is called. Sending evaluation events for allFlags will cause flags to never report as stale and may cause inaccuracies in guarded rollouts and experiments with false impressions.

Implementation

• MUST Set sendEventsOnlyForVariation: true in the SDK options

Validation

• Pass calls to allFlags do not generate evaluation/summary events

Bootstrapping strategy defined and implemented

Prevent UI flicker by rendering with known values before the SDK connects and retrieves flags. To learn more about bootstrapping, read Bootstrapping.

Implementation

• SHOULD Enable bootstrap: 'localStorage' or bootstrap from a server-side-SDK

Validation

• Pass if under offline/slow network the first paint uses bootstrapped values with no visible flash of wrong content.